diff options
Diffstat (limited to 'adduser.c')
| -rw-r--r-- | adduser.c | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/adduser.c b/adduser.c deleted file mode 100644 index 6bd2c25..0000000 --- a/adduser.c +++ /dev/null @@ -1,366 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * adduser - add users to /etc/passwd and /etc/shadow - * - * - * Copyright (C) 1999 by Lineo, inc. - * Written by John Beppu <beppu@lineo.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <errno.h> -#include <fcntl.h> -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <shadow.h> -#include <time.h> -#include <unistd.h> -#include <sys/param.h> -#include <sys/stat.h> -#include <sys/types.h> -#include "busybox.h" -#include "pwd_grp/pwd.h" -#include "pwd_grp/grp.h" - -#define PASSWD_FILE "/etc/passwd" -#define SHADOW_FILE "/etc/gshadow" - -#if 0 -# define PASSWD_FILE "passwd" -# define SHADOW_FILE "shadow" -#endif - -/* structs __________________________ */ - -typedef struct { - uid_t u; - gid_t g; -} Id; - -/* data _____________________________ */ - -/* defaults : should this be in an external file? */ -static char *default_passwd = "x"; -static char *default_gecos = "Embedix User,,,"; -static char *default_home_prefix = "/home"; -static char *default_shell = "/bin/sh"; - -/* shadow in use? */ -static int shadow_enabled = 0; - -/* I was doing this all over the place */ -static FILE *fopen_wrapper(const char *filename, const char *mode) -{ - FILE *f; - - f = fopen(filename, mode); - if (f == NULL) { - fprintf(stderr, "adduser: %s: %s\n", filename, strerror(errno)); - } - return f; -} - -/* remix */ -/* EDR recoded such that the uid may be passed in *p */ -static int passwd_study(const char *filename, struct passwd *p) -{ - struct passwd *pw; - FILE *passwd; - - const int min = 500; - const int max = 65000; - - passwd = fopen_wrapper(filename, "r"); - if (!passwd) - return 4; - - /* EDR if uid is out of bounds, set to min */ - if ((p->pw_uid > max) || (p->pw_uid < min)) - p->pw_uid = min; - - /* stuff to do: - * make sure login isn't taken; - * find free uid and gid; - */ - while ((pw = fgetpwent(passwd))) { - if (strcmp(pw->pw_name, p->pw_name) == 0) { - /* return 0; */ - return 1; - } - if ((pw->pw_uid >= p->pw_uid) && (pw->pw_uid < max) - && (pw->pw_uid >= min)) { - p->pw_uid = pw->pw_uid + 1; - } - } - - /* EDR check for an already existing gid */ - while (getgrgid(p->pw_uid) != NULL) - p->pw_uid++; - - /* EDR also check for an existing group definition */ - if (getgrnam(p->pw_name) != NULL) - return 3; - - /* EDR bounds check */ - if ((p->pw_uid > max) || (p->pw_uid < min)) - return 2; - - /* EDR create new gid always = uid */ - p->pw_gid = p->pw_uid; - - /* return 1; */ - return 0; -} - -static void addgroup_wrapper(const char *login, gid_t gid) -{ - int argc = 4; - char *argv[] = { "addgroup", "-g", NULL, NULL }; - char group_id[8]; - char group_name[32]; - - strncpy(group_name, login, 32); - argv[3] = group_name; - sprintf(group_id, "%d", gid); - argv[2] = group_id; - addgroup_main(argc, argv); -} - -static void passwd_wrapper(const char *login) -{ - char *prog = "passwd"; - execlp(prog, prog, login, NULL); - error_msg_and_die("Failed to execute 'passwd', you must set the password for '%s' manually\n", login); -} - -/* - * pwd_to_spwd - create entries for new spwd structure - * - * pwd_to_spwd() creates a new (struct spwd) containing the - * information in the pointed-to (struct passwd). - */ -#define DAY (24L*3600L) -#define WEEK (7*DAY) -#define SCALE DAY -static struct spwd *pwd_to_spwd(const struct passwd *pw) -{ - static struct spwd sp; - - /* - * Nice, easy parts first. The name and passwd map directly - * from the old password structure to the new one. - */ - sp.sp_namp = pw->pw_name; - sp.sp_pwdp = pw->pw_passwd; - - /* - * Defaults used if there is no pw_age information. - */ - sp.sp_min = 0; - sp.sp_max = (10000L * DAY) / SCALE; - sp.sp_lstchg = time((time_t *) 0) / SCALE; - - /* - * These fields have no corresponding information in the password - * file. They are set to uninitialized values. - */ - sp.sp_warn = -1; - sp.sp_expire = -1; - sp.sp_inact = -1; - sp.sp_flag = -1; - - return &sp; -} - -/* putpwent(3) remix */ -static int adduser(const char *filename, struct passwd *p) -{ - FILE *passwd; - int r; - FILE *shadow; - struct spwd *sp; - - /* make sure everything is kosher and setup uid && gid */ - passwd = fopen_wrapper(filename, "a"); - if (passwd == NULL) { - /* return -1; */ - return 1; - } - fseek(passwd, 0, SEEK_END); - - /* if (passwd_study(filename, p) == 0) { */ - r = passwd_study(filename, p); - if (r) { - if (r == 1) - error_msg("%s: login already in use\n", p->pw_name); - else if (r == 2) - error_msg("illegal uid or no uids left\n"); - else if (r == 3) - error_msg("group name %s already in use\n", p->pw_name); - else - error_msg("generic error.\n"); - /* return -1; */ - return 1; - } - - /* add to passwd */ - if (putpwent(p, passwd) == -1) { - /* return -1; */ - return 1; - } - fclose(passwd); - - /* add to shadow if necessary */ - if (shadow_enabled) { - shadow = fopen_wrapper(SHADOW_FILE, "a"); - if (shadow == NULL) { - /* return -1; */ - return 1; - } - fseek(shadow, 0, SEEK_END); - sp = pwd_to_spwd(p); - sp->sp_max = 99999; /* debianish */ - sp->sp_warn = 7; - fprintf(shadow, "%s:!:%ld:%ld:%ld:%ld:::\n", - sp->sp_namp, sp->sp_lstchg, sp->sp_min, sp->sp_max, - sp->sp_warn); - fclose(shadow); - } - - /* add to group */ - /* addgroup should be responsible for dealing w/ gshadow */ - addgroup_wrapper(p->pw_name, p->pw_gid); - - /* Clear the umask for this process so it doesn't - * * screw up the permissions on the mkdir and chown. */ - umask(0); - - /* mkdir */ - if (mkdir(p->pw_dir, 0755)) { - perror_msg("%s", p->pw_dir); - } - /* Set the owner and group so it is owned by the new user. */ - if (chown(p->pw_dir, p->pw_uid, p->pw_gid)) { - perror_msg("%s", p->pw_dir); - } - /* Now fix up the permissions to 2755. Can't do it before now - * since chown will clear the setgid bit */ - if (chmod(p->pw_dir, 02755)) { - perror_msg("%s", p->pw_dir); - } - /* interactively set passwd */ - passwd_wrapper(p->pw_name); - - return 0; -} - - -/* return current uid (root is always uid == 0, right?) */ -static uid_t i_am_not_root() -{ - return geteuid(); -} - -/* - * adduser will take a login_name as its first parameter. - * - * home - * shell - * gecos - * - * can be customized via command-line parameters. - * ________________________________________________________________________ */ -int adduser_main(int argc, char **argv) -{ - int i; - char opt; - char *login; - char *gecos; - char *home = NULL; - char *shell; - char path[MAXPATHLEN]; - - struct passwd pw; - - /* init */ - if (argc < 2) { - show_usage(); - } - gecos = default_gecos; - shell = default_shell; - - /* get args */ - for (i = 1; i < argc; i++) { - if (argv[i][0] == '-') { - opt = argv[i][1]; - switch (opt) { - case 'h': - home = argv[++i]; - break; - case 'g': - gecos = argv[++i]; - break; - case 's': - shell = argv[++i]; - break; - default: - error_msg("invalid option -- %c\n", opt); - break; - } - } else { - break; - } - } - - /* got root? */ - if (i_am_not_root()) { - error_msg_and_die( "Only root may add a user or group to the system.\n"); - } - - /* get login */ - if (i >= argc) { - error_msg_and_die( "adduser: no user specified\n"); - } - login = argv[i]; - - /* create string for $HOME if not specified already */ - if (!home) { - snprintf(path, MAXPATHLEN, "%s/%s", default_home_prefix, login); - path[MAXPATHLEN - 1] = 0; - home = path; - } - /* is /etc/shadow in use? */ - shadow_enabled = (0 == access(SHADOW_FILE, F_OK)); - - /* create a passwd struct */ - pw.pw_name = login; - pw.pw_passwd = default_passwd; - pw.pw_uid = 0; - pw.pw_gid = 0; - pw.pw_gecos = gecos; - pw.pw_dir = home; - pw.pw_shell = shell; - - /* grand finale */ - i = adduser(PASSWD_FILE, &pw); - - return (i); -} - -/* $Id: adduser.c,v 1.1 2001/08/21 16:18:59 andersen Exp $ */ |